Where can I find the log files?

1) On Linux:

/opt/poolparty/tomcat/logs/

See also: PoolParty Directory Structure Linux

2) On Windows:

C:\Program Files\Apache Software Foundation\Tomcat X.0

See also: PoolParty Directory Structure WindowsPoolParty Directory Structure Windows

Detailed information about PoolParty log files and logging find here: Monitoring and Logging